Up & Coming Extensions

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Color Folders

Color your Folder Treeview Icons!

Rated 4 out of 5 stars (86)
18,402 users

SmartTemplate4

SmartTemplate4 offers an easy way to automatically create customized replies by auto-inserting various mail headers. Templates can be created for every account as well as for the default (all email accounts). Also supports the Stationery Add-on.

Rated 5 out of 5 stars (39)
15,044 users

ReFwdFormatter

Remove the ">" prefix from quote when you make a reply.
Remove "[" and "]" from the subject when you make a forward.

Rated 4 out of 5 stars (7)
2,933 users

Manually sort folders

This extension allows you to manually sort (order) your folders in the folder pane of Thunderbird or automatically sort them, but in a better way. This extension also allows you to re-order accounts in the folder pane.

Rated 4 out of 5 stars (78)
59,888 users

HTitle

Hide title bar if window is maximized.

This extension created only for GNOME 3. It can create problems with another DE (KDE, XFCE, etc). However, you can use HTitle at your own risk (need enable "legacy" mode on settings page).

Rated 5 out of 5 stars (48)
3,814 users

IMAP Received Date

Make the “Received” column in IMAP folders show when messages were actually received.

Rated 5 out of 5 stars (6)
1,119 users

Flat Folder Tree

Selectively breakout or promote sub-folders under an intermediate folder in the folder tree. Use with IMAP servers where some folders remain collapsed under special namespace like [Gmail] or the INBOX itself.

Rated 4 out of 5 stars (17)
2,350 users

withAttach

This extension adds a menu option (and a toolbar button) to compose an email "with attachments"...

Rated 4 out of 5 stars (13)
5,694 users

quickFilters

Quickly generate mail filters on the fly, by dragging and dropping mails and analyzing their attributes. Create a filter in less than 10 seconds, it's as easy as: drag, click, click.

Now supports easy merging of filters.

Rated 5 out of 5 stars (9)
6,429 users

Too Many Recipients

Contourne la limite du nombre de destinataires/e-mail des serveurs SMTP.
Gets around the limit on the number of recipients/e-mail of SMTP servers.
Evita la limitación de número de destinatarios/e-mail del servidor SMTP.

Rated 4 out of 5 stars (5)
1,072 users

Todoist for Thunderbird

Todoist is a leading online task manager and we manage millions of todos! Todoist for Thunderbird makes it super easy to manage your todos and email directly from Thunderbird.

Watch a short video:
https://www.youtube.com/watch?v=VixEQJb5Qc0

Rated 4 out of 5 stars (9)
4,104 users

Subject Manager

Manages subject of composed emails.

Rated 5 out of 5 stars (8)
2,044 users

Silent Block

Minimum and fast URL blocking by regular expressions.

Rated 5 out of 5 stars (15)
4,357 users

Ruler Bar

This appends a ruler to the mail composition window.

Rated 4 out of 5 stars (8)
2,990 users

Custom Address Sidebar

Allow you to help address sidebar more useful.

Rated 5 out of 5 stars (5)
3,423 users

Show All Body Parts No Restart

Enable the View | Message Body As | All Body Parts message display mode.

Rated 5 out of 5 stars (12)
6,343 users

Tag Toolbar

Add toolbar for toggling tags.

Rated 5 out of 5 stars (29)
14,559 users

Firesizer

Allows you to resize the window to specific dimensions.

Rated 4 out of 5 stars (114)
42,949 users

Quicktext

Quicktext is an extension for Thunderbird that lets you create templates that can be easily inserted into your own emails.

Rated 5 out of 5 stars (217)
71,200 users

KDE Wallet password integration

This is an extension that allows firefox use kde's kwallet password manager to store passwords.

Rated 4 out of 5 stars (75)
2,036 users